The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 10, 2020
Filed:
Nov. 27, 2018
Government of the United States, As Represented BY the Secretary of the Army, Washington, DC (US);
Jan L. Allen, Silver Spring, MD (US);
Joshua L. Allen, Columbia, MD (US);
Samuel A. Delp, III, Silver Spring, MD (US);
Jeffrey B. Wolfenstine, Silver Spring, MD (US);
T. Richard Jow, Potomac, MD (US);
GOVERNMENT OF THE UNITED STATES OF AMERICA, AS REPRESENTED BY THE SECRETARY OF THE ARMY, Aberdeen Proving Ground, MD (US);
Abstract
A positive electrode material having a nominal stoichiometry LiCoSiFeMM'(PO)where M is a trivalent cation selected from at least one of Cr, Ti, Al, Mn, Ni, V, Sc, La and/or Ga, M′ is a divalent cation selected from at least one of Mn, Ni, Zn, Sr, Cu, Ca and/or Mg, y is within a range of 0<y≤0.10 and x is within a range of 0≤x≤0.2. The use of double compositional modification to LiCoPOincreases the discharge capacity from ˜100 mAh/g to about 130 mAh/g while retaining the discharge capacity retention of the singly Fe-substituted LiCoPO. Additional compositional modification to include Si increases the cycle life and greatly improved the coulombic efficiency to between 97-100% at a C/3 cycle rate.